I purchased a drum of oil from Tri-County petroleum a few years ago. At that time they said ExxonMobil changed the Delvac 1240 to XD-3 40. Supposed to be same oil, but the XD-3 was more recognized by users before merger. Could be also to differentiate the CF-2 oil from the traditional Delvac line. BTW, you supplied the drum and they filled it. They supplied new labels for the drum and msds.

I perceive that John found this thread amusing. Don't knock it, John, you were here once.

I contacted Tri-County, which is now Petro Choice, and they said 1240 is now 1640, or maybe it was 1540, not sure. Both Advance and Autozone have 1540. I tried to look up the XD-3 product data sheet and it crashed my browser so I don't know what it ways.

Yeah, no wonder John found it amusing. Wait a second. John, what was that about the coolant?

This come up like clockwork about every few months, or so. I just get a chuckle out of it. Everybody has a type of oil that they love, live and die by. If it was me and a 2 stroke, I would go with what Clifford says... This issue hasn't come up for me before. We have a 4 stroke, 15w40 for us.

Coolant? Don't ask. There is an old BCM article on it, otherwise PM Clifford privately and ask him...LOL. There are enough colors out there to do a Christmas tree with.

Yea, I pretty much agree. Only thing is, I'm having a dilly of a time finding the stuff. A nice NAPA desk man took the time to find out the Mobil part number but it didn't come up in his system so he couldn't even order it for me. Step in the right direction, I guess. Same story at Advance. It comes up as a listing in their resources but they can't get it. In fact they're the ones that sent me over to NAPA.

And we get to start all over on coolants.........GAAAAAAAAAAAAAAAAAAAAAaaaaaaaaaaaaaaaaaaaaaaah!

Bern, I have been using Delo 100. I tried to switch to the Mobile based on some recommendations, but I just could not get it here. It appears that that is the case--that it is only available in some places. Anyway, despite some strong preferences, it seems to me that people have been running the Delo 100 or Shell Rotella for many many miles without complaint. So ultimately, any brand the meets the specs will probably be fine and will allow you to move on to the next worry.

Never been a problem for me we have a mom and pop auto supply here the guy can get Mobil,Shell Delo or any other brand overnight what I like about the Delvac it comes 5 gals to case sorry guys I had to throw that in

Bern, I have been using Delo 100. I tried to switch to the Mobile based on some recommendations, but I just could not get it here. It appears that that is the case--that it is only available in some places. Anyway, despite some strong preferences, it seems to me that people have been running the Delo 100 or Shell Rotella for many many miles without complaint. So ultimately, any brand the meets the specs will probably be fine and will allow you to move on to the next worry.

Yeah, it looks like I'm stuck with Rotella for the same reason. Advance has some Rotella T-1 40w that's API CF-2 so unless I can find something else fast it looks like that's where I'll be going. But it ain't like I didn't try.

Never been a problem for me we have a mom and pop auto supply here the guy can get Mobil,Shell Delo or any other brand overnight what I like about the Delvac it comes 5 gals to case sorry guys I had to throw that in

Methinks we have here the difference between a conviction and a preference!

Thanks, guys. I think we've about beat this horse to a pulp. I appreciate all the input, and you'll probably see me again when I run into another question.

Looking at some old service records I see Greyhound used Gulf Lube or Texaco Ursa at the Dallas service terminal they changed the oil every 5000 miles fwiw back before all the hype about Delo 100 the Delo RPM Special 40 w was common for the old engines